Apply suggestions from code review

Co-authored-by: Michael Sproul <michael@sigmaprime.io>

beacon_node/beacon_chain/tests/sync_committee_verification.rs

@@ -1,4 +1,4 @@
-// #![cfg(not(debug_assertions))]
+#![cfg(not(debug_assertions))]
 
 use beacon_chain::sync_committee_verification::{Error as SyncCommitteeError, SyncCommitteeData};
 use beacon_chain::test_utils::{BeaconChainHarness, EphemeralHarnessType, RelativeSyncCommittee};